After much coding and tea I now have a section in the Text Formatter that can make a reasonable job of tidying up a gedcom import bio that is reasonably structured. See the text formatter page [below] for the example of the first one.
I have some other really messy ones to work on so a full working version is still a long way off but it is a start for a section I thought might be impossible.
Sorry but it is still only Windows based and very much Alpha if anyone wants to try it. (PM me)